In 2010 from May 25th to September 15th, the greater Los Angeles area saw little to no aerial spraying despite winter temperatures during the first month of that period. On September 15th 2010, the chemical laden exhaust trails began to plague armies of plans that painted grids, giant geometrical shapes, etc.
This year of 2011 has seen the same reduction in all chemical trail activity as of the end of May. We are carefully studying the skies awaiting their return. The question remains, will they return? Will they, as they did in 2010, change their spraying patterns to better conceal their nefarious intent? Moving from solid white lines to dotted bursts that are more difficult to notice.
As the month passes, keep your eyes on the sky. Remember that at least in Los Angeles the temperatures are summer season until mid-December, so very little change in the atmosphere over Southern California. There should be no nature increase in emission burn off.
Look up. Take pictures. Post them to the internet for tracking.